Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2006-03-21
2006-03-21
Truong, Duc (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C528S373000, C528S422000, C428S690000, C428S917000
Reexamination Certificate
active
07015301
ABSTRACT:
The invention pertains to an (electro)luminescent polymer-acceptor system comprising a polymer with a plurality of chromophores doped with an acceptor for transferring excitation energy from the polymer to the acceptor wherein at least one wavelength of the polymer emission is a wavelength at which the acceptor absorbs energy, and for emitting energy as photons, characterized in that the dwell time of an exciton that is to be transferred from the polymer to the acceptor is longer than the time for transferring said exciton from the polymer to the acceptor, by satisfying the equationin-line-formulae description="In-line Formulae" end="lead"?kETpp<kETpd,in-line-formulae description="In-line Formulae" end="tail"?wherein kETppis the rate constant of the energy transfer at λ between two chromophores of the polymer, kETpdis the rate constant of the energy transfer at λ between the polymer and the acceptor. If the energy transfer processes in the polymer-acceptor system can be described by Förster theory the above equation can be rewritten asR_pd<R0pd·(τETppτn)1/6{overscore (R)}pdis the mean distance between the polymer and the acceptor, R0pdis the Förster radius, and τETppand τnare the experimental lifetimes of a single chromophore and of the plurality of chromophores of the polymer, respectively.
REFERENCES:
patent: 5712361 (1998-01-01), Stern et al.
patent: 0892028 (1999-01-01), None
patent: 1043382 (2000-10-01), None
Lee C-L et al: “Polymer Phosphorescent Light-emitting devices doped with tris (2-Phenylpyridine) Iridium as a triplet emitter” applied physics letters, American Institute of Physics. NY, US, vol. 77, No. 5, (Oct. 9, 2000), pp. 2280-2282, XP000964144.
Stefano Martina et al; “N-Protected Pyrrole Derivatives Substituted for Metal-Catalyzed Cross-Coupling Reactions”, Aug. 1991, pp. 613-615.
EJ.W. List et al.; Excitation energy migration in highly emissive semiconducting polymers, Jul. 21, 2000, pps. 132-138.
Albert Van Dijken
Brunner Klemens
Koninklijke Philips Electronics , N.V.
Truong Duc
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